Tourmaline Properties

Tourmaline Properties loose sale price & Tourmaline Gemstone Information

  • PROPERTIES

  • Refractive Index 1.624-1.644

  • Hardness = 7-7.5 (Moh's Scale)

  • Specific Gravity =3.06

  • Species - Tourmaline.

  • Optic Character - Double Refraction.

  • Phenomena - Chatoyancy,

  • color change (rare).